a-a a-i aaa aad aae aai aax ad- ada add ade adi adx aea aed aee aei aex ai- aia aid aie aii aix ax- axa axe axi axx daa dad dae dai dax dda ddd dde ddi ddx de- dea ded dee dei dex di- dia did die dii dix dxd dxi dxx eaa ead eae eai eax ed- eda edd ede edi edx eea eed eee eex eia eid eie eii eix ex- exa exd exe exi exx i-d ia- iaa iad iae iai ida idd ide idi idx ie- iea ied iee iei iex iia iid iie iii iix ixe ixi xaa xad xda xde xdi xed xee xex xia xie xii xix xxi xxx